Japanese market plays on the time.
In FX, the world is its market! It starts at 6:00~7:00 in Wellington and keeps till the end on Saturday morning in New York. It does not matter public holiday in Japan. And it is possible to trade in public holiday in the Europe and the United States.
3 major markets are Tokyo, London, and NY. But in fact, there is no actual building of "market" there. Inter banks such as Wellington, Sydney, Tokyo, Hong Kong, and singer pole are at the center of the market.
The feature of the market in Tokyo is that its movement is usually poor. It moves a bit before and after 8:00 am. It also moves on the time (about 10:00 am) deciding back trade rate of the day. And, an uninteresting chart keeps basically.
In that way, FX is suitable for salary man. This keeps safe in almost daytime. Of course, by saying so, it does not mean that it never moves in day time. It may move sometimes. It is ideal to check a chart by a cell phone.